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• W1981462068 endingPage "5489" @default.
• W1981462068 startingPage "5479" @default.
• W1981462068 abstract "The absolute second-order reaction rate coefficient, k1, for the gas phase reaction, O(3P)+N2H4→products, was studied in a discharge flow-tube apparatus. The reaction was studied under pseudo-first-order conditions in O(3P) concentration (i.e., [N2H4]≫[O(3P)]). The O atoms were generated by a microwave discharge of a suitable precursor gas in He in a fixed side-arm reactor upstream of the flow tube, or in the sliding inner injector of the flow tube. The hydrazine concentration was photometrically measured and introduced into the apparatus in a flow of He via the sliding injector or the fixed side-arm port, respectively. The kinetics of the O-atoms in the reaction was directly followed by 130.2–130.6 nm cw-resonance fluorescence detection of O(3P) at the fixed detector situated downstream of the flow tube. The Arrhenius expression, k1=(7.35±2.16)×10−13 exp[(640±60)/T] cm3 molec−1 s−1, in the temperature range 252–423 K, was fit to the data points. The rate coefficient at room temperature was, within experimental errors, independent of the He buffer gas pressure in the range 1.74 to 8.30 Torr, or the O-atom source reactor. The formation of OH(X 2Π) in the reaction, which can be vibrationally excited (v″≤2), was directly detected by pulsed laser-induced fluorescence. The total yield of OH in the reaction was determined to be (0.15±0.05) at 298 K, of which ∼50% is thought to be produced vibrationally hot. These results suggest that the single-H-atom removal channel is a minor process, in agreement with earlier molecular beam studies in which a direct two-H-atom removal channel was proposed to be the principal reaction mechanism by which O(3P) reacts with N2H4." @default.
• W1981462068 created "2016-06-24" @default.
• W1981462068 creator A5012917229 @default.
• W1981462068 date "1996-04-08" @default.
• W1981462068 modified "2023-09-26" @default.
• W1981462068 title "Discharge flow‐tube studies of O(³<i>P</i>)+N₂H₄ reaction: The rate coefficient values over the temperature range 252–423 K and the OH(<i>X</i> ²Π) product yield at 298 K" @default.
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• W1981462068 doi "https://doi.org/10.1063/1.471787" @default.
• W1981462068 hasPublicationYear "1996" @default.
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